Define Sex Joke Meaning

Heard of that guy named Dick who lives in Virginia?
( get it? Virginia? Virgina? Dick in Virgina? ) Sex joke.

Dude i just had sex with a prostitute

That's not sex, thats "joke sex"...

Dude: Ima search something up
5 minutes later: *sees a sex joke*
Dude: What the hell is this shit?
Me: Sex jokes. It's the entirety of Urban Dictionary.